WO2023228862A1 - Compresseur rotatif - Google Patents

Compresseur rotatif Download PDF

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Publication number
WO2023228862A1
WO2023228862A1 PCT/JP2023/018613 JP2023018613W WO2023228862A1 WO 2023228862 A1 WO2023228862 A1 WO 2023228862A1 JP 2023018613 W JP2023018613 W JP 2023018613W WO 2023228862 A1 WO2023228862 A1 WO 2023228862A1
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WO
WIPO (PCT)
Prior art keywords
housing
leg
rotary compressor
circumferential direction
section
Prior art date
Application number
PCT/JP2023/018613
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English (en)
Japanese (ja)
Inventor
紘史 島谷
郁男 江崎
Original Assignee
三菱重工サーマルシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Publication of WO2023228862A1 publication Critical patent/WO2023228862A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00

Definitions

  • the present disclosure relates to a rotary compressor.
  • a rotary compressor is one of the compressors used in refrigeration equipment, air conditioning equipment, etc. (for example, Patent Document 1).
  • the present disclosure has been made in view of these circumstances, and an object of the present disclosure is to provide a rotary compressor that can reduce vibrations during driving.
  • a rotary compressor of the present disclosure includes a housing having a cylindrical part extending in the height direction along the axis, and a housing that is housed in the housing and extends in the circumferential direction around the axis. a compression part that compresses a refrigerant and is fixed to the cylindrical part by a plurality of welded parts formed therein; a drive part that is housed in the housing and drives the compression part; and a drive part that is provided on the outer peripheral surface of the cylindrical part. and a plurality of leg portions for fixing the housing to an installation surface, the positions of the leg portions corresponding to the positions of the welded portions in the circumferential direction.
  • vibrations during driving can be reduced.
  • FIG. 1 is a longitudinal cross-sectional view showing a rotary compressor according to an embodiment of the present disclosure.
  • 1 is a plan view showing a rotary compressor according to an embodiment of the present disclosure.
  • FIG. 2 is a side view showing the rotary compressor of FIG. 1 installed on an installation surface. 2 is a partially enlarged view of part A shown in FIG. 1.
  • FIG. 3 is a plan view showing a modification of the rotary compressor according to an embodiment of the present disclosure.
  • a rotary compressor (hereinafter simply referred to as "compressor") 1 is a hermetic electric rotary compressor used for, for example, an air conditioner or a refrigeration device.
  • the compressor 1 has a weight of 6.5 kg or less, and includes a compressor main body 10 and an accumulator 12.
  • the accumulator 12 is connected to the compressor main body 10 via a suction pipe 11.
  • the compressor main body 10 includes a substantially cylindrical housing 2, a rotating shaft body 3, an electric motor (drive section) 5, and a rotary compression section (compression section) 6.
  • the rotational axis CL1 of the rotating shaft body 3 coincides with the central axis CL2 of the housing 2.
  • the rotating shaft body 3 is arranged so that its extension direction is the vertical direction, and rotates around the rotation axis CL1 within the housing 2.
  • the housing 2 is of a closed type and extends in the vertical direction. This vertical direction corresponds to, for example, the height direction of the housing 2 when the compressor 1 is installed on the installation surface FL (see FIG. 3).
  • the housing 2 includes a cylindrical portion 21 extending in the height direction along the central axis CL2, and an upper lid portion 22 and a lower lid portion 23 that close the upper and lower openings of the cylindrical portion 21. There is.
  • the outer diameter of the cylindrical portion 21 is, for example, 95 mm or less.
  • a plurality of leg portions 7 are fixed to the lower outer peripheral surface 21b of the cylindrical portion 21. As shown in FIG. 2, the legs 7 are arranged at predetermined angular intervals in the circumferential direction. In the case of FIG. 2, three legs 7 are arranged at intervals of about 120 degrees in the circumferential direction. Note that, in order to simplify the explanation, FIG. 2 omits illustration of some components (for example, detailed parts of the accumulator 12, the upper lid part 22, the rotating shaft body 3, and the upper bearing 4A). .
  • the compressor 1 is installed by fixing each leg 7 to the installation surface FL via a vibration isolating rubber 8.
  • the housing 2 has an opening 24 formed at a position facing the outer peripheral surface of the cylinder 60 at the lower part of the side wall.
  • a suction port 25 is formed in the cylinder 60 at a position facing the opening 24 and communicates with a predetermined position within the cylinder.
  • An oil reservoir is formed at the bottom of the housing 2 to store lubricating oil.
  • the liquid level of the oil reservoir when the oil is initially filled is located above the rotary compression section 6. Thereby, the rotary compression section 6 is driven in the oil pool.
  • the upper lid part 22 is provided with a discharge pipe 13 and a terminal block 30.
  • the discharge pipe 13 penetrates the upper lid portion 22 in the thickness direction, and has a lower portion disposed inside the housing 2 and an upper portion disposed outside the housing 2 .
  • the discharge pipe 13 discharges the compressed refrigerant to the outside of the housing 2 .
  • the terminal block 30 is provided with three power supply terminals 31 for supplying power to the electric motor 5. Three-phase AC power is supplied to the power supply terminal 31 from an inverter device (not shown).
  • the accumulator 12 is used to separate the refrigerant into gas and liquid before supplying it to the compressor main body 10.
  • the accumulator 12 has a substantially cylindrical shape and is fixed to the housing 2 (outer peripheral surface 21b of the cylindrical portion 21) via a bracket 14.
  • An inlet pipe 15 is provided at the top of the accumulator 12 for introducing refrigerant led from an evaporator (not shown).
  • a suction pipe 11 for causing internal refrigerant to be sucked into the compressor main body 10 is connected to the accumulator 12 .
  • Suction pipe 11 is connected to suction port 25 through opening 24 of housing 2 .
  • the accumulator 12 supplies gaseous refrigerant to the rotary compression section 6 via the suction pipe 11 .
  • the electric motor 5 is housed in the center of the housing 2 in the vertical direction.
  • the electric motor 5 has a rotor 51 and a stator 52.
  • the rotor 51 is fixed to the outer peripheral surface of the rotating shaft body 3 and is arranged above the rotary compression section 6 .
  • the stator 52 is arranged to surround the outer peripheral surface of the rotor 51, and is fixed to the inner peripheral surface 21a of the cylindrical portion 21 of the housing 2 (for example, by shrink fitting). Electric power is supplied to the stator 52 from each power supply terminal 31 via the wiring 32 .
  • the electric motor 5 is configured such that a rotor 51 is rotated by electric power supplied from the power supply terminal 31. Further, as the rotor 51 rotates, the rotating shaft body 3 is rotationally driven around the rotation axis CL1. At this time, the rotation of the electric motor 5 is vector controlled.
  • the rotary compression section 6 includes a cylinder 60, an upper bearing 4A, and a lower bearing 4B. ).
  • the upper bearing 4A and the lower bearing 4B are each made of a metal material and are fixed to the cylinder 60 with bolts 61.
  • the rotating shaft body 3 is rotatably supported around the rotation axis CL1 by an upper bearing 4A and a lower bearing 4B.
  • the rotary compression section 6 further includes an eccentric shaft section 62 and a piston rotor 63 provided around the eccentric shaft section 62.
  • the eccentric shaft portion 62 is formed at the lower part of the rotary shaft body 3, and is provided offset in a direction orthogonal to the rotation axis CL1 of the rotary shaft body 3 in a space formed by the inner circumferential surface of the piston rotor 63. .
  • the piston rotor 63 has a cylindrical shape with an outer diameter smaller than the inner diameter of the cylinder 60, is disposed in a space formed by the inner circumferential surface of the cylinder 60, and is mounted on the outer circumferential surface of the eccentric shaft portion 62. Fixed. The piston rotor 63 rotates eccentrically with respect to the rotation axis CL1 as the rotation shaft body 3 rotates.
  • the rotary compression section 6 is formed with a compression chamber 60A, a suction hole 60B, and a discharge hole (not shown).
  • the compression chamber 60A is defined by a space formed by the inner peripheral surface of the cylinder 60 being sandwiched between the upper bearing 4A and the lower bearing 4B.
  • a piston rotor 63 is housed within this compression chamber 60A.
  • the suction hole 60B is a hole for guiding refrigerant from the outside of the cylinder 60 to the compression chamber 60A, and is formed in the cylinder 60 along a direction perpendicular to the rotation axis CL1.
  • the rotary compression section 6 configured as described above is fixed to the housing 2. Specifically, as shown in FIGS. 1 and 2, for example, the upper bearing 4A is fixed by plug welding at multiple locations in the circumferential direction of the cylindrical portion 21.
  • plug welding connects the upper bearing 4A to the housing 2 by a welding part 70 formed so as to penetrate from the outer circumferential surface 21b of the cylindrical part 21 to reach the upper bearing 4A. It is fixed against. Therefore, the welded portion 70 is a fixing point between the housing 2 and the rotary compression section 6, and is also an excitation position (excitation source) that transmits vibrations and mechanical reaction force from the rotary compression section 6 to the housing 2. .
  • the welds 70 are arranged at equal angular intervals in the circumferential direction. In the case of FIG. They are formed at 120 degree intervals.
  • the number of welded portions 70 is not limited to three, and may be four or more, for example. Further, the welded portion 70 may be formed on the cylinder 60 instead of the upper bearing 4A. That is, the cylinder 60 may be plug-welded to the cylindrical portion 21.
  • the compressor 1 configured as described above operates as follows. Refrigerant led from an evaporator (not shown) is taken into the accumulator 12 via an inlet pipe 15. The refrigerant is separated into gas and liquid within the accumulator 12, and the gas phase is led to the rotary compression section 6 via the suction pipe 11. In the rotary compression section 6, refrigerant is introduced into the compression chamber 60A via the suction hole 60B. Then, due to the eccentric rolling of the piston rotor 63, the volume of the compression chamber 60A gradually decreases, and the refrigerant is compressed. The compressed refrigerant is guided into the space formed between the discharge cover 65 and the upper bearing 4A through a discharge hole (not shown) formed in the cylinder 60, and then discharged into the space inside the housing 2. Ru. The refrigerant discharged into the space inside the housing 2 is guided from a discharge pipe 13 provided at the upper part of the housing 2 to a condenser (not shown).
  • corresponding means that the leg portion 7 overlaps the welded portion 70 in the circumferential direction. In other words, this means that the welded portion 70 is located directly above the leg portion 7, as shown in FIGS. 1 and 2.
  • the line L2 when viewed from above as shown in FIG.
  • the line L2 is ⁇ 10 degrees with respect to the reference line L1, with the central axis CL2 as the center of the angle.
  • the leg portions 7 are arranged so as to fall within the range of .
  • the leg part 7 is arranged so that the line L2 coincides with the line L1.
  • the position of the leg portion 7 corresponds to the position of the rotary compression section 6 in the height direction of the cylindrical portion 21. It is preferable that you do so. This allows the leg portion 7 to be brought closer to the welded portion 70, which is the vibration position of the housing 2.
  • leg portion 7 overlaps with any of the parts constituting the rotary compression section 6 in the height direction.
  • leg portion 7 overlaps the lower bearing 4B that constitutes the rotary compression portion 6 in the height direction.
  • the effects of this embodiment described above are as follows.
  • the position of the leg 7 corresponds to the position of the weld 70 in the circumferential direction, so by bringing the weld 70, which is the excitation position, closer to the leg 7, the reaction force generated at the weld 70 can be reduced. It becomes easier to receive it at the leg part 7. Thereby, vibrations of the compressor 1 caused by the reaction force can be reduced. Therefore, by making the housing 2 thinner, for example, the compressor 1 can be made smaller and lighter, and material costs can be reduced.
  • the reaction force at the welding unit 70 is received by the leg unit 7, so that the cylindrical By reducing twisting of the portion 21 (housing 2), it is possible to suppress deterioration in controllability due to relative phase shift between the stator 52 and the rotor 51.
  • twisting of the cylindrical portion 21 occurs as follows. That is, a force in the circumferential direction due to the reaction force at the welding portion 70 is applied to the cylindrical portion 21 by driving the rotary compression portion 6 . Furthermore, a circumferential force due to the torque reaction force that the stator 52 receives due to the rotation of the electric motor 5 acts on the cylindrical portion 21 to which the stator 52 is fixed. Due to the combination of these two forces, while the rotary compression section 6 is being driven, the cylindrical section 21 undergoes a torsional displacement that causes it to swing in the circumferential direction. Furthermore, when the cylindrical portion 21 is twisted to cause it to swing, the stator 52 fixed to the inner circumferential surface 21a of the cylindrical portion 21 similarly oscillates in the circumferential direction. In this case, a relative phase shift will occur between the stator 52 and the rotor 51.
  • the leg portion 7 when the position of the leg portion 7 is made to correspond to the position of the rotary compression portion 6 in the height direction, the leg portion 7 can be brought even closer to the welding portion 70 which is the vibration excitation position. This makes it easier for the leg portions 7 to receive the reaction force at the weld portion 70.
  • the leg portion 7 in the circumferential direction when the center position of the leg portion 7 in the circumferential direction is made to coincide with the center position of the welded portion 70 in the circumferential direction, the leg portion 7 can be brought closest to the welded portion 70 which is the vibration excitation position. This makes it easier for the leg portions 7 to receive the reaction force at the weld portion 70.
  • the reaction force at the welded portion 70 can be handled in a well-balanced manner.
  • an auxiliary leg part 9 may be provided between one leg part 7 corresponding to the position of the welding part 70 and the leg part 7 adjacent thereto (preferably at an intermediate position).
  • the auxiliary leg portions 9, like the leg portions 7, are provided at predetermined angular intervals in the circumferential direction with respect to the lower outer peripheral surface 21b of the cylindrical portion 21. Further, the auxiliary leg portion 9 is provided at the same height position as the leg portion 7.
  • the auxiliary leg section 9, like the leg section 7, is fixed to the installation surface FL via the anti-vibration rubber 8. With this configuration, the reaction force at the welding part 70 can be received not only by the leg part 7 but also by the auxiliary leg part 9. Thereby, vibration of the compressor 1 and twisting of the cylindrical portion 21 (housing 2) can be further reduced.
  • auxiliary leg portions 9 are provided between all the leg portions 7, but the auxiliary leg portions 9 do not necessarily need to be provided between all the leg portions 7.
  • a rotary compressor includes a housing (2) having a cylindrical portion (21) extending in a height direction along an axis (CL2), and a housing (2) housed in the housing and arranged along the axis (CL2). a compression part (6) for compressing a refrigerant, fixed to the cylindrical part by a plurality of welds (70) formed in a circumferential direction around the housing; and a drive housed in the housing for driving the compression part.
  • a housing having a cylindrical portion extending in the height direction along the axis, and a plurality of welded portions housed in the housing and formed in the circumferential direction around the axis.
  • a compression part that compresses the refrigerant is fixed to the cylindrical part by a drive part that is housed in the housing and drives the compression part, and a drive part that is provided on the outer peripheral surface of the cylindrical part and fixes the housing to the installation surface.
  • the position of the leg corresponds to the position of the welding part in the circumferential direction, so it is used as the connection point with the compression part and is the vibration excitation position for the cylindrical part (housing).
  • the leg By bringing the welded portion and the leg closer together, the leg can more easily receive the reaction force at the welded portion. Thereby, vibration of the rotary compressor caused by the reaction force can be reduced. Therefore, by making the housing thinner, for example, the compressor can be made smaller and lighter, and material costs can be reduced. Furthermore, by receiving the reaction force with the legs, it is possible to reduce twisting of the cylindrical portion (housing) caused by the reaction force. Therefore, problems with the drive unit caused by twisting of the cylindrical part (housing) are suppressed (for example, when the drive unit is an electric motor, a decrease in controllability due to a relative phase shift between the stator and rotor) is suppressed. can do.
  • the drive section includes a stator (52) fixed to the housing and a rotor (51) connected to the compression section.
  • the electric motor (5) is
  • the drive section is an electric motor having a stator fixed to the housing and a rotor connected to the compression section, so that the drive section is connected to the compression section.
  • the position of the leg portion corresponds to the position of the compression part in the height direction.
  • the position of the leg corresponds to the position of the compression part in the height direction, so that the leg can be brought closer to the welding part which is the excitation position. can. This makes it easier for the legs to receive the reaction force at the weld.
  • the center position of the leg in the circumferential direction is the center position of the welded part in the circumferential direction.
  • the leg since the center position of the leg in the circumferential direction coincides with the center position of the weld in the circumferential direction, the leg can be brought closest to the weld which is the excitation position. I can do it. This makes it easier for the legs to receive the reaction force at the weld.
  • the welded portion and the leg portion are arranged at approximately equal angular intervals in the circumferential direction.
  • the welded portion and the leg portion are arranged at approximately equal angular intervals in the circumferential direction, so that the reaction force at the welded portion can be handled in a well-balanced manner.
  • the outer circumferential surface of the cylindrical portion between the leg portion and the leg portion adjacent thereto is provided with an auxiliary leg (9) provided.
  • the auxiliary leg portion is provided on the outer peripheral surface of the cylindrical portion between the leg portion and the adjacent leg portion, not only the leg portion but also the auxiliary leg portion It is also possible to receive a reaction force at the welding part, which is the excitation position. Thereby, vibration of the rotary compressor and twisting of the cylindrical portion (housing) can be further reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un compresseur rotatif grâce auquel il est possible de réduire les vibrations pendant l'entraînement. Ce compresseur rotatif comprend : un boîtier (2) présentant une section cylindrique (21) qui s'étend dans la direction de la hauteur le long d'un axe central (CL2) ; une unité de compression rotative (6) qui est logée dans le boîtier (2), qui est fixée à la section cylindrique (21) par une pluralité de sections soudées (70) formées dans la direction circonférentielle autour de l'axe central (CL2), et qui comprime un fluide frigorigène ; un moteur électrique qui est logé dans le boîtier (2), et qui entraîne l'unité de compression rotative (6) ; et une pluralité de pieds (7) qui sont disposés sur une surface circonférentielle externe (21b) de la section cylindrique (21), et qui sont destinés à fixer le boîtier (2) sur une surface de placement. Les positions des pieds (7) correspondent aux positions des sections soudées (70) dans la direction circonférentielle.
PCT/JP2023/018613 2022-05-23 2023-05-18 Compresseur rotatif WO2023228862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-083757 2022-05-23
JP2022083757A JP2023172146A (ja) 2022-05-23 2022-05-23 ロータリ圧縮機

Publications (1)

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WO2023228862A1 true WO2023228862A1 (fr) 2023-11-30

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PCT/JP2023/018613 WO2023228862A1 (fr) 2022-05-23 2023-05-18 Compresseur rotatif

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JP (1) JP2023172146A (fr)
WO (1) WO2023228862A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465410U (fr) * 1977-10-18 1979-05-09
JP2001132674A (ja) * 1999-11-04 2001-05-18 Matsushita Electric Ind Co Ltd 密閉型ロータリー圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465410U (fr) * 1977-10-18 1979-05-09
JP2001132674A (ja) * 1999-11-04 2001-05-18 Matsushita Electric Ind Co Ltd 密閉型ロータリー圧縮機

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Publication number Publication date
JP2023172146A (ja) 2023-12-06

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